Effects of yttrium on corrosive erosion and dry sand erosion of FeAlCr(Y) diffusion coatings on 1030 steel

Research was conducted to investigate yttrium effects on the performance of FeAlCr diffusion coating on 1030 steel under corrosive erosion, dry sand erosion and corrosion attacks, respectively. The coating was made by a pack-cementation process. Corrosive erosion losses of Y-free and Y-containing FeAlCr coatings in a dilute NaCl slurry containing 30% silica sand and in a dilute H2SO4 slurry containing 30% silica sand were determined, respectively. The corrosion rates and electrochemical characteristics of the FeAlCr(Y) coatings in both dilute H2SO4 solution and NaCl solution were also determined. In addition, dry sand erosion of the coatings was evaluated. The experimental results showed that yttrium remarkably improved the resistance of FeAlCr coating to corrosion, corrosive erosion and dry sand erosion, respectively.